8
left. SO suggest charging. See the picture in right.
◆
Life check OK, and voltage check over low
The result indicates the battery life is only 11.88V left and over low
voltage, which can affect the result. At this time it is better to charge prior to
checking again.
5-3 start-up load test
5-3-1preparation
If the engine is working, please turn off first and switch the key to off
location.
5-3-2 procedure of operation
(1) Connect the red clamp to the positive terminal, with the black to the
negative. Make sure all connections are well contacted to ensure the
accurate test.
(2) Press <
▲
><
▼
>to select start-up load test as the picture below:
(3) After selecting the test item, press <ENTER> to display the result as the
picture below:
As can be seen in the picture current test voltage is 12.36V, standard
voltage is 9.6V, (for 24V system, standard voltage is 16V), the
13
6-2 Is the result affected by the installation of negative
current for the vehicle?
All the negative currency will affect the result. Therefor please remove
the negative currency prior to checking, in order to achieve the accurate
data.
6-3 Can this tester predict when the battery goes down?
The internal resistance of the sealed lead-acid battery is complicated. It
is generated by ohm internal resistance, concentration polarization internal
resistance, chemical reactions internal resistance and interference effect
caused by double capacitance’s charging. The ingredient of internal
resistance and its relative content will change with different test method and
different test moment, which can lead to different tested value of the internal
resistance. And there is no strict relationship between internal resistance (or
conductance) and capacitance of the sealed lead-acid battery. So it is
impossible to predict the life of battery according to a single battery’s internal
resistance. But it can be predicted the life of the battery will be over soon
from the sudden increase of its internal resistance and decrease of its
conductance.
6-4 Is the CCA value tested by this tester correct?
CCA is considered as a control standard with the produce of the battery.
According to the accumulated records, the tested value of new battery is 10-
15% higher than the standard value, and along with consuming of the battery,
the value is getting close to standard, even lower afterward.
6-5 What is the difference between the method of this
tester and the load test method?
The load test method: According to the physical formula R=V/1, test
equipment forcibly make the high permanent DC current ( presently 40-80A
large current is available ) go through the battery shortly ( about 2-3
seconds). And then the tested voltage of the battery can be used to figure out
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